#include <iostream>
using namespace std;

int main()
{
    int number;
    cout<<"enter an integer: ";
    cin>>number;
    cout<<endl;

    if(number>=0)
    {
        cout<<"The number is positive or zero."<<endl;
        if(number>0)
        {
            cout<<"Now i'm sure it is positive."<<endl;
        }
        else{
            cout<<"Now i'm sure it is zero."<<endl;
        }
    }
    else{
        cout<<"Now i'm sure it is negative."<<endl;
    }
}